Numerous wood borers have been found in redbud. Agrilus otiosus, three species of Hypothenemus, three species of Micracis, two species of Microcisella, Pityophthorus lautus, Ptosima gibbicollis, and Thysanoes fimbricornis all inhabit portions of the wood of redbud.
Other insects feed on the leaves of redbud. The redbud leaffolder, Fascista cercerisella, feeds on leaves which the larvae web together. The grape leaffolder, Desmia funeralis, an important pest of grape, also feeds on redbud. The Japanese weevil, Callirhopalus bifasciatus, and Norape ovina both consume redbud leaves.
Other insects feed on redbud by extracting juices from the plant. The twolined spittlebug, Prosapia bicincta, has been recorded feeding on redbud. The terrapin scale, Mesolecanium nigrofasciatum, and San Jose scale, Quadraspidiotus perniciosus, like most of the other redbud parasites, inhabit a variety of hosts including redbud. The periodical cicada, Magicicada septendecim, lays its eggs in more than 70 species of trees and other plants, including redbud.
There are three main diseases of redbud: leaf anthracnose, Mycosphaerella cercidicola, Botryosphaeria canker, and Verticillium wilt (6). The most serious is the canker Botryosphaeria ribis or its variety chromogena. The species is mainly a saprobe; the variety is a parasite. This variety produces stem and twig lesions and entire groves of redbuds have been killed by this disease. Verticillium wilt (Verticillium albo-atrum) sometimes kills redbuds, especially in the Midwestern United States. Redbud is vulnerable to Texas root rot (Phymatotrichum omnivorum), but redbud is not commonly grown in its range. A variety of sap and heart rots also infect eastern redbud.
- Burns, Russell M., and Barbara H. Honkala, technical coordinators. 1990. Silvics of North America: 1. Conifers; 2. Hardwoods. Agriculture Handbook 654 (Supersedes Agriculture Handbook 271,Silvics of Forest Trees of the United States, 1965). U.S. Department of Agriculture, Forest Service, Washington, DC. vol.2, 877 pp. http://www.na.fs.fed.us/spfo/pubs/silvics_manual/table_of_contents.htm
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